:root {
  /* 绿色主题 */
  --primary-color: #4CAF50;
  --primary-light: #81C784;
  --primary-dark: #388E3C;
  --secondary-color: #4caf50;
  --accent-color: #FFC107;
  --light-gray: #f5f5f5;
  --dark-gray: #333333;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(76, 175, 80, 0.15);
  --shadow-hover: 0 8px 30px rgba(76, 175, 80, 0.25);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
  overflow-x: hidden;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Background Effects */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 10% 20%, rgba(76, 175, 80, 0.05) 0%, transparent 20%),
              radial-gradient(circle at 90% 80%, rgba(76, 175, 80, 0.05) 0%, transparent 20%);
  z-index: -1;
}

/* Header */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  color: var(--dark-gray);
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

header.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.15);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

.logo-icon {
  margin-right: 0.5rem;
  font-size: 2rem;
  transition: all 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 2rem;
  position: relative;
}

.nav-links a {
  color: var(--dark-gray);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a:hover {
  color: var(--primary-color);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 3px;
  bottom: 0;
  left: 0;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transition: all 0.3s ease;
  border-radius: 10px;
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 10rem 0 6rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.1) 0%, transparent 40%),
    radial-gradient(circle at 70% 70%, rgba(255,255,255,0.15) 0%, transparent 40%);
  transform: rotate(30deg);
  animation: float 20s infinite linear;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(0,0,0,0.05)"/></svg>');
  background-size: cover;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 8px rgba(0,0,0,0.3);
  animation: fadeInUp 1s ease;
  background: linear-gradient(to right, #fff, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 2.5rem;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease 0.3s both;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

@keyframes float {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cta-button {
  display: inline-block;
  background-color: var(--white);
  color: var(--primary-color);
  padding: 1.2rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  border: 2px solid var(--white);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.cta-button:hover {
  background-color: transparent;
  color: var(--white);
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.cta-button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%);
  transform-origin: 50% 50%;
}

.cta-button:focus:not(:active)::after {
  animation: ripple 1s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  100% {
    transform: scale(50, 50);
    opacity: 0;
  }
}

/* Section titles */
.section-title {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-dark);
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.section-title p {
  color: var(--text-light);
  max-width: 700px;
  margin: 2rem auto 0;
  font-size: 1.1rem;
}

/* Features Section */
.features {
  padding: 6rem 0;
  background-color: var(--white);
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top left, rgba(76, 175, 80, 0.03) 0%, transparent 30%),
              radial-gradient(circle at bottom right, rgba(76, 175, 80, 0.03) 0%, transparent 30%);
  pointer-events: none;
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
}

.section-title h2 {
  font-size: 2.8rem;
  color: var(--dark-gray);
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 5px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(76, 175, 80, 0.3);
}

.section-title p {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 2rem auto 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  position: relative;
  z-index: 1;
}

.feature-card {
  background: linear-gradient(135deg, var(--white), #f8f9fa);
  border-radius: 20px;
  padding: 2.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.03);
  backdrop-filter: blur(10px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transition: height 0.4s ease;
  z-index: -1;
}

.feature-card:hover::before {
  height: 5px;
}

.feature-card:hover {
  transform: translateY(-15px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
  transform: rotate(30deg);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover::after {
  opacity: 1;
}

.feature-icon {
  font-size: 3.5rem;
  margin-bottom: 1.8rem;
  color: var(--primary-color);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  display: inline-block;
}

.feature-card:hover .feature-icon {
  transform: scale(1.3) rotate(15deg);
  color: var(--primary-dark);
  text-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
}

.feature-card h3 {
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
  color: var(--dark-gray);
  transition: all 0.3s ease;
}

.feature-card:hover h3 {
  color: var(--primary-dark);
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.8;
  font-size: 1.05rem;
}

/* Downloads Section */
.downloads {
  padding: 6rem 0;
  background: linear-gradient(135deg, var(--light-gray), var(--white));
  position: relative;
  overflow: hidden;
}

.downloads::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(76, 175, 80, 0.05) 0%, transparent 25%),
    radial-gradient(circle at 80% 70%, rgba(76, 175, 80, 0.05) 0%, transparent 25%);
  pointer-events: none;
}

.downloads .section-title h2 {
  color: var(--primary-dark);
}

.platforms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
  position: relative;
  z-index: 1;
}

.platform-card {
  background: linear-gradient(135deg, var(--white), #f8f9fa);
  border-radius: 20px;
  padding: 2.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.03);
  backdrop-filter: blur(10px);
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transition: height 0.4s ease;
  z-index: -1;
}

.platform-card:hover::before {
  height: 5px;
}

.platform-card:hover {
  transform: translateY(-15px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.platform-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
  transform: rotate(30deg);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.platform-card:hover::after {
  opacity: 1;
}

.platform-icon {
  font-size: 3.5rem;
  margin-bottom: 1.8rem;
  color: var(--primary-color);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  display: inline-block;
}

.platform-card:hover .platform-icon {
  transform: scale(1.3) rotate(15deg);
  color: var(--primary-dark);
  text-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
}

.platform-card h3 {
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
  color: var(--dark-gray);
  transition: all 0.3s ease;
}

.platform-card:hover h3 {
  color: var(--primary-dark);
}

.platform-card p {
  color: var(--text-light);
  margin-bottom: 1.8rem;
  line-height: 1.8;
  font-size: 1.05rem;
}

/* Screenshots section */
.screenshots {
  padding: 6rem 0;
  background-color: var(--white);
  position: relative;
  overflow: hidden;
}

.screenshots::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 25%, rgba(76, 175, 80, 0.04) 0%, transparent 20%),
    radial-gradient(circle at 85% 75%, rgba(76, 175, 80, 0.04) 0%, transparent 20%);
  pointer-events: none;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  position: relative;
  z-index: 1;
}

.screenshot-card {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.screenshot-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.3));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.screenshot-card:hover::before {
  opacity: 1;
}

.screenshot-card:hover {
  transform: translateY(-15px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.screenshot-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.4) 0%, transparent 70%);
  transform: rotate(30deg);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.screenshot-card:hover::after {
  opacity: 0.7;
}

.screenshot-card img {
  width: 100%;
  height: auto;
  display: block;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  z-index: 0;
}

.screenshot-card:hover img {
  transform: scale(1.05) rotate(2deg);
}

/* Footer */
footer {
  background: linear-gradient(135deg, #2c3e50, #1a2a3a);
  color: var(--white);
  padding: 4rem 0 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 10% 20%, rgba(76, 175, 80, 0.1) 0%, transparent 30%),
    radial-gradient(circle at 90% 80%, rgba(76, 175, 80, 0.1) 0%, transparent 30%);
  pointer-events: none;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
  text-align: left;
  position: relative;
  z-index: 1;
}

.footer-section h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.8rem;
  color: var(--white);
}

.footer-section h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: 10px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  padding-left: 0;
}

.footer-links a::before {
  content: '→';
  position: absolute;
  left: -20px;
  opacity: 0;
  transition: all 0.3s ease;
  color: var(--primary-light);
}

.footer-links a:hover {
  color: var(--primary-light);
  padding-left: 10px;
}

.footer-links a:hover::before {
  opacity: 1;
  left: 0;
}

.copyright {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.6);
  position: relative;
  z-index: 1;
}

/* Responsive design */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
  }

  .nav-links {
    margin-top: 1rem;
  }

  .nav-links li {
    margin: 0 1rem;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .features-grid,
  .platforms,
  .screenshots-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 4rem 0;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero p {
    font-size: 0.9rem;
  }
  
  .cta-button {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
  
  .section-title h2 {
    font-size: 1.8rem;
  }
  
  .feature-card,
  .platform-card {
    padding: 1.5rem;
  }
  
  .nav-links li {
    margin: 0 0.5rem;
  }
}